Surgical procedures are identical for the 2 surgeons of the study (GB and PT) with 30-50ml gastric pouch. Linear. side to side. Antegastric and antecolic gastrojejunal anstomosis . Use of Echelon 60 linear stapler with GOLD cartridges on stomach. Blue to perform the gastrojejunal anastomosis and white on Small bowel. Peroperativeblood loss and need to apply clips or stitches on the gastric staple line are recorded. Operation time and patient information (BMI. Comorbidities) are recorded as well any noticeable or unexpected event.